Word origin · etymology
Greek comparison-word, English geometry, and an eponym.
Synastry uses together-star roots; midpoint composite describes putting halfway positions together; Davison names Ronald Davison. The three names identify different comparison constructions.
Merriam-Webster: synastry ↗Merriam-Webster: composite ↗Mona Riegger: Beyond Midlife, Appendix on astrological techniques ↗
How we know · epistemology
Distinct chart constructions with practitioner interpretations
Each method has different inputs and geometry. Reproducible contacts or combined positions do not establish another person's feelings, the quality of a relationship or its future.
Astrodienst: Composite Chart, Midpoint-method ↗Astrodienst: Davison Relationship Chart variants ↗
Connected concepts
Browse other concepts in System gateways →
These links connect subjects and terminology. They do not establish a shared historical origin.
Sources & provenance
Use the citations beside each section to distinguish a calculation convention, a historical teaching and an editorial example.